The Most Powerful Life Extension System

*The power is not that simple to gained.
Even with the godly system!
As the poor youth he had obtained the worest system!
The Life Extension System.
By passing through the bodies of those who were about to die in different world!
His main missiong is to strugged for extend his own live.
 [Ding, Hua Tuo who is going to die!] 
"Prime Minister Cao, your illness does not require craniotomy. Actually, you are a mental illness. . . " 
After a round of persuasion, the mission was successful.
He was rewarded with [Hua Tuo's magical medical skills]!
How many dying person he needs to become？
Could he survive to the end and become the strogest person in this world？